AirHint found the following cheapest return flights from Auckland (AKL) to Tongatapu (TBU) in August 2025 (see full year).

Return flights

20 Aug - 27 Aug	Fiji Airways
19 Aug - 27 Aug	Fiji Airways
28 Aug - 05 Sep	Fiji Airways
26 Aug - 02 Sep	Fiji Airways
21 Aug - 27 Aug	Fiji Airways
25 Aug - 01 Sep	Air New Zealand	direct
19 Aug - 26 Aug	Fiji Airways
16 Aug - 23 Aug	Fiji Airways
16 Aug - 21 Aug	Fiji Airways

Also check the deals for one-way flights from Auckland to Tongatapu in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Auckland to Tongatapu in August from 324€

Return flights